What two main parts comprise the lower appendicular skeleton?

The lower appendicular skeleton is primarily composed of two main parts: the pelvis and the lower extremities. The pelvis serves as a stable base for supporting the weight of the upper body when sitting and standing, while also providing attachment points for the lower limbs. The lower extremities include the thigh, leg, and foot bones, which facilitate movement and support during activities such as walking, running, and jumping.

This anatomical structure is designed for bipedal locomotion, which is a distinct feature of many mammals, including humans. The combination of the pelvis and lower extremities is crucial for both mobility and stability, making it essential in the study of human anatomy and any discussion regarding the skeletal system's functional applications. Other options include components that do not pertain to the lower appendicular skeleton, such as the upper extremities, vertebral column, and skull.